diff --git a/README.md b/README.md
index c7bd8c7..3f2da85 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ Long list of geospatial analysis tools. Geospatial analysis, or just spatial ana
     - [Lidar](#lidar)
     - [3D Application](#3d-application)
     - [Geographic Data Mining](#geographic-data-mining)
+    - [GNSS/INS Post Processing](#gnss/ins-post-processing)
     - [Atmospheric Correction](#atmospheric-correction)
     - [Agent-based Modeling](#agent-based-modeling)
     - [Landscape Metrics](#landscape-metrics)
@@ -273,6 +274,15 @@ Long list of geospatial analysis tools. Geospatial analysis, or just spatial ana
 * [GeoDMA](https://sourceforge.net/projects/geodma/) - GeoDMA is a plugin for TerraView software, used for geographical data mining.
 * [Weka](http://www.cs.waikato.ac.nz/ml/weka/) - Weka is a collection of machine learning algorithms for data mining tasks written in Java.
 
+## GNSS/INS Post Processing
+
+* [Applanix POSPAC MMS](https://www.applanix.com/products/pospac-mms.htm) - POSPac MMS leverages Global Navigation Satellite Systems (GNSS) and inertial navigation systems (INS) data to generate a source of truth for post-mission trajectories and mapping.
+* [Leica Infinity Surveying Software](https://leica-geosystems.com/en-us/products/gnss-systems/software/leica-infinity) - Easily manage and process data from multiple sites and survey teams and from all of your different survey instruments – digital levels, total stations, UAVs, GNSS sensors, and now even scanners.
+* [Novatel Waypoint](https://novatel.com/products/waypoint-post-processing-software) - Waypoint software leverages Global Navigation Satellite Systems (GNSS) and inertial navigation systems (INS) data to generate a source of truth for post-mission trajectories and mapping.
+* [RTKLIB](https://github.com/tomojitakasu/RTKLIB) - RTKLIB is an open source program package for standard and precise positioning
+with GNSS (global navigation satellite system).
+* [Trimble Business Center](https://geospatial.trimble.com/en/products/software/trimble-business-center) - Trimble® Business Center (TBC) software enables surveyors to transform field data from GNSS receivers, total stations, laser scanners, mobile mapping systems, drones and more into high-quality, actionable information and client deliverables.
+
 
 ## Atmospheric Correction
 
@@ -289,13 +299,6 @@ Long list of geospatial analysis tools. Geospatial analysis, or just spatial ana
 * [SIAC](https://github.com/MarcYin/SIAC) - A sensor invariant Atmospheric Correction (SIAC).
 * [SIAC_GEE](https://github.com/MarcYin/SIAC_GEE) - SIAC GEE version.
 
-## GNSS/INS Post Processing
-* [Applanix POSPAC MMS](https://www.applanix.com/products/pospac-mms.htm) - POSPac MMS leverages Global Navigation Satellite Systems (GNSS) and inertial navigation systems (INS) data to generate a source of truth for post-mission trajectories and mapping.
-* [Leica Infinity Surveying Software](https://leica-geosystems.com/en-us/products/gnss-systems/software/leica-infinity) - Easily manage and process data from multiple sites and survey teams and from all of your different survey instruments – digital levels, total stations, UAVs, GNSS sensors, and now even scanners.
-* [Novatel Waypoint](https://novatel.com/products/waypoint-post-processing-software) - Waypoint software leverages Global Navigation Satellite Systems (GNSS) and inertial navigation systems (INS) data to generate a source of truth for post-mission trajectories and mapping.
-* [RTKLIB](https://github.com/tomojitakasu/RTKLIB) - RTKLIB is an open source program package for standard and precise positioning
-with GNSS (global navigation satellite system).
-* [Trimble Business Center](https://geospatial.trimble.com/en/products/software/trimble-business-center) - Trimble® Business Center (TBC) software enables surveyors to transform field data from GNSS receivers, total stations, laser scanners, mobile mapping systems, drones and more into high-quality, actionable information and client deliverables.
 
 ## Agent-based Modeling
 * [DMASON](https://github.com/isislab-unisa/dmason) - DMASON is a parallel version of the MASON library for writing and running simulations of Agent based simulation models.
@@ -614,6 +617,7 @@ with GNSS (global navigation satellite system).
 * [Photon](https://github.com/komoot/photon) - Photon is an open source geocoder built for OpenStreetMap data. It is based on elasticsearch.
 * [Proj4j](https://github.com/locationtech/proj4j) - Java port of the Proj.4 library for coordinate reprojection.
 * [Spatial4j](https://github.com/locationtech/spatial4j) - Spatial4j is a general purpose geospatial ASL licensed open-source Java library.
+* [Weka](http://www.cs.waikato.ac.nz/ml/weka/) - Weka is a collection of machine learning algorithms for data mining tasks written in Java.
 * [World Wind Java SDK](http://worldwind.arc.nasa.gov/java/) - Nasa cross-platform Java SDK.
 
 ## JavaScript